8 examples of 'python split array into chunks' in Python

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189def split_into_chunks(iterable, chunk_length):
190 args = [iter(iterable)] * chunk_length
191 return zip_longest(*args)
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45def _split_into_chunks(value: int) -> Iterable[int]:
46 while value >= 32: # 2^5, while there are at least 5 bits
47
48 # first & with 2^5-1, zeros out all the bits other than the first five
49 # then OR with 0x20 if another bit chunk follows
50 yield (value & 31) | 0x20
51 value >>= 5
52 yield value
1236def SplitIteratorIntoChunks( iterator, n ):
1237
1238 chunk = []
1239
1240 for item in iterator:
1241
1242 chunk.append( item )
1243
1244 if len( chunk ) == n:
1245
1246 yield chunk
1247
1248 chunk = []
1249
1250
1251
1252 if len( chunk ) > 0:
1253
1254 yield chunk
147def reshape_arrays_in_stacked_chunks(arrays, chunks):
148 """Reshape the arrays such that all the chunks are stacked along the last dimension.
149
150 In effect, this will make the arrays have only one chunk over the first dimensions.
151 """
152 h_fac = len(chunks[1])
153 v_fac = len(chunks[0])
154 res = []
155 for array in arrays:
156 cols = hsplit(array, h_fac)
157 layers = []
158 for col in cols:
159 layers.extend(vsplit(col, v_fac))
160 res.append(np.stack(layers, axis=2))
161
162 return res
18def splitArray(arraySize, maxRequest):
19 modulusCalculation = arraySize % maxRequest
20 fixedLoop = arraySize // maxRequest
21 return modulusCalculation, fixedLoop
51def split(a, n):
52 """Split a into n evenly sized chunks"""
53 k, m = len(a) / n, len(a) % n
54 return [a[i * k + min(i, m):(i + 1) * k + min(i + 1, m)]
55 for i in xrange(n)]
169def split(self, *arrays: Union[np.ndarray, pd.DataFrame, pd.Series]):
170 """
171 Split data.
172
173 Parameters
174 ----------
175 *arrays
176 Dataset for split.
177 Size of dim 0 must be equal to :meth:`~Splitter.size`.
178 If None, return the split indices.
179
180 Returns
181 -------
182 tuple
183 List containing split of inputs. if inputs are None, only return
184 the indices of split. if ``test_size`` is 0, test data/index will
185 not return.
186 """
187 if self._test is None:
188 raise RuntimeError('split action is illegal because `test_size` is none')
189
190 if len(arrays) == 0:
191 return self._train, self._test
192
193 ret = []
194 for array in arrays:
195 self._size_check(array)
196 ret.extend(self._split(array, self._train, self._test))
197 return tuple(ret)
29def chunks(l, n):
30 """ Yield successive n-sized chunks from l.
31 """
32 chunks = []
33 for i in range(0, len(l), n):
34 chunks.append([{'mentee': mentee} for mentee in l[i:i + n]])
35 return chunks

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